Abstract
We discuss the parameter spaces of supersymmetry (SUSY) scenarios taking into account the improved Higgs-mass prediction provided by FeynHiggs 2.14.1. Among other improvements, this prediction incorporates three-loop renormalization-group effects and two-loop threshold corrections, and can accommodate three separate mass scales: m_{{{tilde{q}}}} (for squarks), m_{tilde{g,}!} (for gluinos) and m_{{{tilde{chi }}}} (for electroweakinos). Furthermore, it contains an improved treatment of the overline{mathrm {DR}} scalar top parameters avoiding problems with the conversion to on-shell parameters, that yields more accurate results for large SUSY-breaking scales. We first consider the CMSSM, in which the soft SUSY-breaking parameters m_0 and m_{1/2} are universal at the GUT scale, and then sub-GUT models in which universality is imposed at some lower scale. In both cases, we consider the constraints from the Higgs-boson mass M_h in the bulk of the (m_0, m_{1/2}) plane and also along stop coannihilation strips where sparticle masses may extend into the multi-TeV range. We then consider the minimal anomaly-mediated SUSY-breaking scenario, in which large sparticle masses are generic. In all these scenarios the substantial improvements between the calculations of M_h in FeynHiggs 2.14.1 and FeynHiggs 2.10.0, which was used in an earlier study, change significantly the preferred portions of the models’ parameter spaces. Finally, we consider the pMSSM11, in which sparticle masses may be significantly smaller and we find only small changes in the preferred regions of parameter space.
Highlights
Given the persistent absence of any signal in the searches for supersymmetric particles at the Large Hadron Collider (LHC) and in direct searches for supersymmetric dark matter (DM), there is strengthened emphasis on the information about the scale of supersymmetry (SUSY) that can be obtained indirectly from other measurements
We first consider the CMSSM, in which the soft SUSY-breaking parameters m0 and m1/2 are universal at the GUT scale, and sub-GUT models in which universality is imposed at some lower scale
We have investigated the physics implications of improved Higgs-boson mass predictions in the Minimal Supersymmetric Standard Model (MSSM), comparing results from FeynHiggs 2.14.1 and FeynHiggs 2.10.0
Summary
Given the persistent absence of any signal in the searches for supersymmetric particles at the Large Hadron Collider (LHC) and in direct searches for supersymmetric dark matter (DM), there is strengthened emphasis on the information about the scale of supersymmetry (SUSY) that can be obtained indirectly from other measurements. It is of key importance to have available calculations of the Higgs mass that are as accurate as possible when one or more soft SUSY-breaking parameters are in the multi-TeV range, and there may be a rather large hierarchy between different supersymmetric mass scales. Important steps in this direction have been taken since the release of FeynHiggs 2.10.0. Many of these advances in the prediction of Mh that are important for sparticle masses in the multi-TeV range are incorporated in the recent release of FeynHiggs 2.14.1 These include three-loop renormalization-group equations (RGEs) with electroweak effects, as well as corresponding twoloop threshold corrections including the possibility of nondegenerate stop mass parameters. In each of these scenarios, our primary concern is the implications of improvements in the FeynHiggs 2.14.1 calculation of Mh (compared to previous, less sophisticated calculations) for the model parameter space
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